| latinský název | český název |
|---|---|
| Baeckea | bekea |
| Baileya | drobnuška |
| Baldellia | |
| Ballota | měrnice |
| Banksia | banksie |
| Barbarea | barborka |
| Barleria | barlerie |
| Barringtonia | baringtonie |
| Bartsia | lepnice |
| Bauhinia | bauhinie |
| Beaucarnea | bokarnea |
| Beccariophoenix | |
| Begonia | begónie |
| Bellis | sedmikráska |
| Berberis | dřišťál |
| Bergenia | bergenie |
| Besleria | beslerie |
| Beta | řepa |
| Bidens | dvouzubec |
| Billardiera | svitečka |
| Billbergia | bilbergie |
| Biophytum | citobýl |
| Bistorta | hadí kořen |
| Bituminaria | bituminárie |
| Bixa | bixa |
| Blechnum | žebrovice |
| Bletia | bletie |
| Bletilla | |
| Boehmeria | ramie |
| Boerhavia | berhavie |
| Bomarea | bomarea |
| Bombax | bombax |
| Bombycilaena | protěžka |
| Borago | brutnák |
| Bougainvillea | bugenvilea |
| Bouvardia | bouvardie |
| Brachychiton | brachychiton |
| Brasiliopuntia | |
| Brassavola | |
| Brassia | |
| Brighamia | |
| Briza | třeslice |
| Browallia | broválie |
| Browningia | |
| Brugmansia | durmanovec |
| Bruguiera | kolenovník |
| Brunfelsia | brunfelzie |
| Bryonia | posed |
| Buglossoides | kamejka |
| Bulbine | bulbine |
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